Surface plasmon noncontact electric field sensors and related methods
US7773228B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2008 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Feb 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A surface-plasmon electric field sensor has a plasmonic portion having an electro-optic dielectric material coated on one side with a transparent conductive layer and on another side with a thin layer of conductive metallic layer. The metallic layer has alternating grating and smooth regions, the smooth regions being of length near a multiple of an effective wavelength of the light in the electro-optic layer, and the grating regions having lines on a pitch near the effective wavelength. The sensor has a light source for illuminating the plasmonic portion with plane-polarized light having a free-space wavelength and a photodetector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.